MM5480

MM5480 LED Display Driver February 1995 MM5480 LED Display Driver General Description The MM5480 is a monolithic MOS integrated circuit utilizing N-channel metal gate low threshold enhancement mode and ion-implanted depletion mode devices It utilizes the MM5451 die packaged in a 28-pin package making it ideal for a 3 digit display The MM5480 is designed to drive common anode-separate cathode LED displays A single pin controls the LED display brightness by setting a reference current through a variable resistor connected either to VDD or to a separate supply of 11V maximum Y Y Y Y Y No load signal required Wide power supply operation TTL compatibility Alphanumeric capability 3 digit displays Applications Y Y Y Y Y Features Y Y Continuous brightness control Serial data input COPSTM microcontrollers or microprocessor displays Industrial control indicator Relay driver Digital clock thermometer counter voltmeter Instrumentation readouts Block Diagram TL F 6138 – 1 FIGURE 1 Connection Diagram Dual-In-Line Package Order Number MM5480N See NS Package Number N28B TL F 6138 – 2 Top View FIGURE 2 COPSTM microcontrollers is a trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 6138 RRD-B30M105 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Voltage at Any Pin Storage Temperature VSS ...